help on how to create this effect...

[spaced_]

ive been trying to figure out how to create this type of pulling effect on a sound (best way i can describe it)...ill post a link to a song that uses it. the notes behind the piano melody are kind of pulled across and then the next 2 notes are quicker. weird question maybe, and kind of hard to explain but i think someone out there will know what im talking about. im pretty sure its not just a held note tho, because you can feel/hear it being stretched kind of. i was thinking maybe its just a reversed sound maybe but not sure.
http://www.youtube.com/watch?v=7s0n5_GpE5M
amazing song by the way too by a great artist, he has some nice chilled out dnb too if anyones into that.
anyway, if anyone can understand what the fuck im trying to explain and/or knows how to create the effect, any help is great.
thanks

[JemGrover]

The sound of the piano? That's just been reversed. It really does sound awesome as an effect, especially on piano

[spaced_]

yea thought thats what it was, but i felt it sounded too good to be that simple haha. sometimes less is more i guess. thanks for the reply man.

[thedefinition]

To me, it sounds like a mixture of two sounds. One of the pianos is just being played forward with some reverb attached to it to give it a tail. The second notes that come in between the first sound being played again, have the reversed reverb technique attached to them.